modelIMS_Start_Polyphase
Starting of polyphase induction machine with slip rings
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
At start time tOn voltages are supplied to the
induction machines with sliprings.
The two machine start from standstill, accelerating inertias against load torque quadratic dependent on speed,
using a starting resistance. At time tRheostat external rotor resistance is shortened, finally reaching nominal speed. Two equivalent machines with different numbers of phases are compared and their equal behavior is demonstrated.
Simulate for 1.5 seconds and plot (versus time):
aimcM|M3.tauElectrical: machine torqueaimsM|M3.wMechanical: machine speedfeedback.y: zero since difference of three-phase current phasor and scaled polyphase current phasor are equal
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | m3 | 3 | Number of stator phases of three-phase system |
| Integer | m | 5 | Number of stator phases |
| Integer | mr | 5 | Number of rotor phases |
| SI.Voltage | VsNominal | 100 | Nominal RMS voltage per phase |
| SI.Frequency | fNominal | aimsData3.fsNominal | Nominal frequency |
| SI.Time | tOn | 0.1 | Start time of machine |
| SI.Resistance | RStart | 0.16/aimsData3.turnsRatio^2 | Starting resistance |
| SI.Time | tRheostat | 1.0 | Time of shortening the rheostat |
| SI.Torque | T_Load | 161.4 | Nominal load torque |
| SI.AngularVelocity | w_Load | Modelica.Units.Conversions.from_rpm(1440.45) | Nominal load speed |
| SI.Inertia | J_Load | 0.29 | Load inertia |
| Modelica.Electrical.Machines.Utilities.ParameterRecords.IM_SlipRingData | aimsData3 | Induction machine data of a three-phase machine | |
| Electrical.Machines.Utilities.ParameterRecords.IM_SlipRingData | aimsDataM | Induction machine data of an m-phase machine |